224 W. £. Hidden—Mazapil Meteoric-iron. 
the observation of the Biela meteors at Zacatecas by Professor 
Bonilla and his assistants. 
The locality of the fall is situated in latitude 24° 35’ North 
and in longitude 101° 56’ 45’ West of Greenwich. 
That no “explosion was heard when this iron fell, is paralleled 
by the account of the fall of the fifty-six pound ‘aerolite near 
Wold Cottage, Yorkshire, England, on Dec. 13th, 1795. ‘This 
stone fell within ten yards of where a laborer was at work. 
No thunder, lightning, or luminous meteor accompanied the 
fall; but in two of the adjacent villages, the sounds were so 
distinct of something passing through the air towards Wold 
Cottage that several people went to see if anything extraordin- 
ary had happened to the house or the grounds.” (4. Fletcher, 
An Introduction to the study of Meteorites, 1886, p. 22). Con- 
cerning the aerolites which fell at 11.50 A.M, on June 28, 
Mazapil Meteoric Iron. Wt. 10 lbs. 4} oz. troy ($ natural size.) 
1876, at Stilldalen, in Sweden, ‘‘it is remarkable that no 
meteor was visible at the place where the stones fell, noong! 
it was seen over nearly all Sweden.” 
The surface of the Mazapil iron is of great interest. The 
Be hollowed depressions entirely cover the mass (see figure 
1). thin black crust coats the surface, and exhibits well 
